import { TreeLike } from './tree';
/**
 * Checks if a specified file within a tree-like structure is a valid YAML file.
 *
 * This function determines whether a file at a given path exists within the provided tree structure
 * and verifies if the content of the file is valid YAML. It utilizes a `TreeAdapter` to interact with
 * the tree structure, allowing file operations like checking existence and reading content.
 *
 * @param tree - An object representing a tree-like structure where files and directories are organized.
 * @param filePath - The path to the file within the tree structure to be checked.
 * @returns `true` if the file exists and contains valid YAML content, otherwise `false`.
 *
 * @typeparam Tree - A generic type that extends `TreeLike`, representing the structure containing the file.
 *
 * @example
 *
 * const fileTree = new FileTree();
 * const result = HasYamlFile(fileTree, 'config/settings.yaml');
 * console.log(result); // Outputs: true or false based on the file's validity as a YAML.
 * ```
 */
export declare function HasYamlFile<Tree extends TreeLike>(tree: Tree, filePath: string): boolean;
/**
 * Retrieves the contents of a JSON file and returns it as an object.
 * If the file does not exist and `create` flag is set to `true`, an empty JSON file will be created.
 *
 * @template T - The type of the returned JSON object.
 * @param tree - The file system tree-like object.
 * @param filePath - The path to the JSON file.
 * @param [create=false] - Flag indicating whether to create the file if it does not exist (default: false).
 * @throws If the JSON file does not exist and `create` flag is set to `false`.
 * @throws If the content of the JSON file could not be parsed.
 * @returns {T} The parsed JSON object.
 */
export declare function GetYamlFile<T = any>(tree: TreeLike, filePath: string, create?: boolean): T;
export interface UpdateYamlFileOptions {
    space?: string | number;
    /**
     * true - create the file if it does not exist
     */
    coerce?: boolean;
}
export declare function UpdateYamlFile<T extends Record<string, any> = Record<string, any>>(tree: TreeLike, updaterOrYamlFile: T | ((yamlFile: T) => void), filePath: string, options?: UpdateYamlFileOptions): void;
export declare function UpdateYamlFile<T extends Record<string, any> = Record<string, any>>(tree: TreeLike, updaterOrYamlFile: T | ((yamlFile: T) => Promise<void>), filePath: string, options?: UpdateYamlFileOptions): Promise<void>;